Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

2 Pages V  1 2 >  
 Reply to this topicStart new topic
> Valve adjustment question? Help!, Strange valve covers with vents?
Jaiden
post Aug 6 2005, 08:24 PM
Post #1


Member
**

Group: Members
Posts: 346
Joined: 13-January 05
From: Stroudsburg PA
Member No.: 3,443
hey all,

Well I decided to take a look at the valves but removing the valve covers is proving to be a pain.
I have a '75 2.0l in my '72 914. The valve covers are bolt on finned aluminum with metal vents on the top that pass through the engine tin and stick theough about 1.25 inches. The vents hook into the oil fill breather.
I could not get the cover off without removing this vent. The problem is that the vent is through mounted on the valve cover and there is no way to put the vents back in? I thought the vents were supposed to face the tranny and come through the engine tin past the valve cover. The covers have holes that face that way but are threaded holes plugged with screws. It does not look like anything the directions show.

Also after getting the covers off my valve adjustment locking nuts need at 14mm not a 13mm what gives?

Any thoughts
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Aug 6 2005, 08:34 PM
Post #2


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
Sound like aftermarket units....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
GS9146Driver
post Aug 7 2005, 08:21 AM
Post #3


Member
**

Group: Members
Posts: 76
Joined: 23-February 04
From: Collinsville, OK
Member No.: 1,706
I'll bet the PO did all the work with the engine removed, then reinstalled it. Never to find out about the trouble they created. Some people like to pull the engine to do their engine work. It lets them use some of their really cool tools. (IMG:http://www.914world.com/bbs2/html/emoticons/screwy.gif)
As last resort, you might have to back date the valve covers to original, though the wire bail retainers can be a little tricky to unlatch and latch. Just my exp.
QUOTE
The vents hook into the oil fill breather.

Is there a breather line vented to the air filter or a puke bottle? If the crank case is only vented to valve covers then where is the pressure going to go? Kind of a closed loop thing going on. Is this thing carbed or inj?
I don't know about the 14mm nuts. (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)

good luck,
geo
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SLITS
post Aug 7 2005, 08:34 AM
Post #4


"This Utah shit is HARSH!"
**********

Group: Benefactors
Posts: 13,602
Joined: 22-February 04
From: SoCal Mountains ...
Member No.: 1,696
Region Association: None
Earlier cars had a 8 mm screw with 13 mm lock nut.

Late cars have 10 mm screw with 14 mm lock nut.

Duh!

Later cars ('75 - '76) did not vent the heads...so, some people added the vents to the valve covers. There is a boss on the head that can be drilled and tapped to emulate the sustem on the '73 - '74. Late cars were "closed" for emissions.

This is for a 2.0L
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post Aug 7 2005, 09:32 AM
Post #5


914 Idiot
**********

Group: Members
Posts: 14,986
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California
Those cast aluminum bolt-on covers suck anyway. They all seem to leak about ten times worse than the originals ever did... Plus they put stress on the rocker stand bolts, which are not very overengineered to begin with.

--DD
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post Aug 7 2005, 12:35 PM
Post #6


Resident German
*************************

Group: Admin
Posts: 41,640
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California
QUOTE (Jaiden @ Aug 6 2005, 07:24 PM)
Strange valve covers with vents?

(IMG:http://www.914world.com/bbs2/html/emoticons/thisthreadisworthlesswithoutpics.gif)
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Jaiden
post Aug 7 2005, 03:18 PM
Post #7


Member
**

Group: Members
Posts: 346
Joined: 13-January 05
From: Stroudsburg PA
Member No.: 3,443
hey guys,
I'll post picks tommorrow when I get to work.

I think that the Owner who put the 75 2.0 did all the work with the motor out.
I'm going to have to find a way to get these valve covers back on so moving the vent or maybe fabbing a way to attach the vents after attaching the valve covers to the motor.

Oh yeah and the valve covers leaked but the covers look like nice quality pieces.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jaiden
post Aug 7 2005, 03:25 PM
Post #8


Member
**

Group: Members
Posts: 346
Joined: 13-January 05
From: Stroudsburg PA
Member No.: 3,443
oh yeah it's a carbed 75 that an owner (at least two ago) had installed.

The internals for the head look really clean too so I think a rebuild wasn't so long ago.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Joe Bob
post Aug 7 2005, 03:58 PM
Post #9


Retired admin, banned a few times
***************

Group: Members
Posts: 17,427
Joined: 24-December 02
From: Boulder CO
Member No.: 5
Region Association: None
You don't NEED the vents. Those aftermarket covers really do suck.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Al Meredith
post Aug 7 2005, 06:45 PM
Post #10


Senior Member
***

Group: Members
Posts: 960
Joined: 4-November 04
From: Atlanta, ga
Member No.: 3,061
Jake Rabe showed me some carbon fiber valve covers that were a little deeper on top to accomadate for a high lift cam.
User is online!Profile CardPM
Go to the top of the page
+Quote Post
Jaiden
post Aug 8 2005, 05:48 AM
Post #11


Member
**

Group: Members
Posts: 346
Joined: 13-January 05
From: Stroudsburg PA
Member No.: 3,443
Here are the pics



Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jaiden
post Aug 8 2005, 05:49 AM
Post #12


Member
**

Group: Members
Posts: 346
Joined: 13-January 05
From: Stroudsburg PA
Member No.: 3,443
The inside pic. You can see the second port. SHould I get these welded up or something?



Attached image(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jaiden
post Aug 8 2005, 09:08 AM
Post #13


Member
**

Group: Members
Posts: 346
Joined: 13-January 05
From: Stroudsburg PA
Member No.: 3,443
Anyone?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
redshift
post Aug 8 2005, 09:12 AM
Post #14


Bless the Hell out of you!
**********

Group: Members
Posts: 10,926
Joined: 29-June 03
Member No.: 869
I would swaP in a stock set.

Of course, I fix my car, and 5 days later, it's worse than before, but maybe my advice isn't broken?

Hard to tell, I noticed both my eyes twitch funny now, and I dream about re-re-re-redoing everything I did last dream..



M
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post Aug 8 2005, 09:16 AM
Post #15


914 Idiot
**********

Group: Members
Posts: 14,986
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California
I agree with Miles--swap in a stock set.

(Agree with Miles? I feel so *filthy* now...)

--DD
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
redshift
post Aug 8 2005, 09:20 AM
Post #16


Bless the Hell out of you!
**********

Group: Members
Posts: 10,926
Joined: 29-June 03
Member No.: 869
It washes off, best to use Pam no-stick before agreeing, and then a spermicidal gel afterwards.

GoJo, and phosphor work too.


M
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SGB
post Aug 8 2005, 09:20 AM
Post #17


just visiting
****

Group: Members
Posts: 4,086
Joined: 8-March 03
From: Huntsville, AL
Member No.: 404
Region Association: South East States
I gotta agree that it looks like a scary attachment- the rocker assy & bolts were not designed to be loaded that way. Seems like it would mess with valve clearance and cause some weird thermal stresses too.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
redshift
post Aug 8 2005, 09:30 AM
Post #18


Bless the Hell out of you!
**********

Group: Members
Posts: 10,926
Joined: 29-June 03
Member No.: 869
The ones I have seen, needed machining to get them true enough to seal.

I have seen, like in the roaring '80s, whole magazing articles on how to modify them to work...

(IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)

Is it not hard enough? heh



M
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jaiden
post Aug 8 2005, 09:30 AM
Post #19


Member
**

Group: Members
Posts: 346
Joined: 13-January 05
From: Stroudsburg PA
Member No.: 3,443
Guys all humour aside I really need to get these covers back on the car.

How much for stockers with the bail wire? When I looked quickly they are crazy expensive new. How about used?

What about using the Other port in the covers? How about other ways to close off these holes?

Can I really close off the vents? While I was checking the motor I did notice on the drivers side that the connection at the vent hose would "bubble" a little Because the hose was a little loose. Does that mean that I have a positive pressure in the crankcase and I need a vent?

I have no knowledge of what this motor has had done to it. Even the PO did not know exactly.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post Aug 8 2005, 10:11 AM
Post #20


Resident German
*************************

Group: Admin
Posts: 41,640
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California
QUOTE (Jaiden @ Aug 8 2005, 08:30 AM)
How much for stockers with the bail wire? When I looked quickly they are crazy expensive new. How about used?

call EASY, can't be more than $5-$10 for the pair (used of course) ...

EASY

(IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) Andy
User is online!Profile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

2 Pages V  1 2 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 17th May 2024 - 02:47 PM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...